Ventilating apparatus



March 6, 1951 o. J. DAVENPORT VENTILATING APPARATUS Filed Nov. 15, 1946 I ureumr Patented Mar. 6, 1951 UNITED STATES PATENT OFFICE VENTILATING APPARATUS 1 Oscar J. Davenport, Pascagoula, Miss. Application November 15, 1946, Serial No. 709,901

This invention relates to novel apparatus of extremely simple construction and which is especially adapted for use for ventilating enclosures and more particularly for exhausting hot or stale air therefrom.

A primary object of the present invention is to provide a ventilating apparatus of extremely simple construction and which may be utilized for extracting air either from a plurality of separate chambers of an enclosure or from a plurality of remote points within a single chamber.

Various other objects and advantages of the inventionwill hereinafter become more fully apparent from the following description of the drawing, illustrating a preferred embodiment thereof, and wherein:

paratus taken substantially along a plane as indicated by the line 2--2 of Figure 1.

Referring more specifically to the drawing, a

I portion of an'enclosure is illustrated in Figure 1 and designated generally 3 and includes an outside wall 4 having an opening. 5 therein, communicating with the atmosphere. In the preferred embodiment of the application of the apparatus, hereinafter to be described, the enclosure 3 includes a combination floor and ceiling 6 separating an upper chamber I from a chamber 8 located directly therebeneath. The chamber 1, for example, might constitute the attic of a dwellingand the. chamber 8 a room located on the floor, directly beneath the attic I. The ceiling and floor 6 is provided with an opening 9 forming a communicating passage between the chambers I and B.

The ventilating apparatus, designated generally I8 and comprising the invention, includes a substantially L-shaped conduit, designated gen- 7 3 Claims. (01. sic-4s) erally II which includes a leg I2 having an open .outer end I3 which is mounted in the opening 9 so as to substantially fill the same. The leg I2 is disposed in substantially a perpendicular position within the upper chamber 1 and is connected with the other leg, designated generally I4, of ,the conduit II by an arcuate portion I5. The sonduitportion I4 is disposed substantially at a right angle to the portion I2 and extends from the arcuate portion I5 in a direction toward the opening 5 of the wall 4. The conduit portion or leg I4 is composed of separate conduit sections I6 and I! having adjacent flanged ends I8, the outwardly extending flanges of which are secured in abutting engagement by detachable fastenings I9. The conduit portion I6 constitutes an integral part of the conduit portions l2 and I5 and the conduit portion I'I forms a separate detachable section thereof. f

A suitable motor, such as an electric motor 20, is disposed in the conduit portion I6 adjacent its open end and is supported therein by brackets having radial arms 2|, fastened at their adjacent ends to the motor, and longitudinally extending arms 22 which extend from conduit portion I 6 into conduit portion I! and which are bolted in portion IT. The members 2|, 22 are preferably formed of angleiron. The bracket means 2|; 22 supports the motor 20 and its driven shaft 23 substantially axially of the conduit leg I4; said shaft 23 extending into the conduit section l1 and having a fan 24 keyed thereto and disposed for rotation in the conduit section-I1. It will be obvious that the motor 20, though disposed in section I6 is supported by conduit section [1. The conduit-section II, between the fan 24 and its open outlet end 25, contains a helical or spiral vane 26 of a width substantially equal to the internal diameter of the conduit section II.

A sleeve-ZI'of substantially greater diameter than the conduit II has an open outer end 28 mounted in and substantially closing the opening 5 of the wall 4; said sleeve 21 extending inwardly of the chamber I from the opening 5 and having the inner portion thereof surrounding and disposed substantially concentric to the outer portion of the conduit section ll. The sleeve 21 is of a substantially greater internal diameter than the external diameter of. the conduit section I I to combine therewith to form an annular passage 29, one end of which opens into the sleeve 21 toward the open end 28 and the opposite end .of

which forms an annular opening 30, defined by a portion of the section I1 and the inner end of the sleeve 21.

From the foregoing it will b readily obvious that when the motor 20 is energized or in opera- .tionthat the $haft23 thereof will be revolvcdin a clockwise direction, looking from left to right of Figure 1, for revolving the fan 24 in the same direction to cause said fan to expel air therefrom toward the open end 25 of the conduit II. This will create a suction in the conduit leg l2 for drawing air through the open end l3 thereof from the chamber 8 which air, as indicated by the arrows in Figure 1, will be drawn from the conduit end l3 toward its opposite end 25, and in passing through the conduit section [1, beyond the fan 24, the air will be subjected to a swirling action in passing around the surfaces of the vane 26, so that the air when expelled from the conduit end 25 will be whirling or revolving as it passes through the sleeve 2.? and is expelled through ithe open end 28 thereof ito ithe atmosphere. This whirling or revolving motion of the air within the sleeve 21 will create a vacuumor suction within the annular passage 129 thereof which will tend to draw air inwardly of said passage 29 through its annular open-endiil and from the upper chamber l, so that the apparatus Ill will function for extracting air from both the chambers 1 and 8 and for expelling it to theatmosphere through the outlet end 28 thereof.

Obviously, the apparatus It] could b utilized for extractin air from two chambers located on substantially :the same level, in which case the conduit H could be ,disposed in substantially a horizontal .planeand theceiling and floor 6 would in .such case constitute -a vertical partition or wall. Likewise, if desired, th ventilating apparatus L could be located in the lower of two ichambers and ,with the conduit leg l2 thereof extending upwardly and opening upwardly into the chamber thereabove.

JAISQ, th apparatus l0 could be located in a singlechamberin which case the ceilingt would be omitted or the reference character 6 could designate a supporting bracket for supporting ttheinlet'end l3 of the-apparatus. When so used,

it will be readily obvious that the 'leg !2 could be extended in length for extracting air from-remote portions of .a relatively large chamber and the tconduit H could obviously be straight instead of curved. Various other modifications and changes are :contemplated and may obviously be resorted to, without departing from the spirit :and scope of the invention as hereinafter defined by the ap ,pended claims.

.I claim:

i1. ,:A .ventilatingapparatus comprising sleeve adaptedito bemounted at one end thereof in an lopening of an outside wall of an enclosure and openingat said'end tothe atmosphere-said sleeve havingan opposite-inner end opening-intoa first .iroom -;of the enclosure, a conduit. of substantially smaller external diameter than the internal diameter of said sleeve having an outlet end dioposed'within theinner end of 'thesleeve and substantially concentric thereto, :the outlet end of said conduit-terminating within the'sleeve and in spaced relationship to the ends of the sleeve, said (conduitextending fromthe inner endof I the sleeve randfhaving-anopposite inlet end opening into1a :second room'of the enclosure, .a driven fan disposedwithin said conduit adjacent its outlet end and adapted to impel air therethrough from the inlet 'end thereof and to-expel the air therefrom into'sai'd 'sleeve and toward the first mentioned, outlet end thereof, said outlet end of the conduit and sleeve combining to form a nozzle for draw ing air into'the sleeve from the first room through ithe iinner end :thereof 1 and for causing the air-to be impelled through the length of the sleeve and ejected therefrom to the atmosphere and means located in said conduit to cause the air ejected therefrom to pass through th sleeve in a whirling motion for increasing the suction in the inlet end of the sleeve, said means comprising a helical vane disposed in the conduit and extending from adjacent the fan to the outlet end thereof, and said vane being of a width substantially equal to the internal diameter of the conduit.

2. A ventilating apparatus comprising a sleeve adapted to be mounted at one end thereof in an opening of an outside wall of an enclosure and opening at said end to the atmosphere, said sleeve having an opposite inner end openinginto a first room of the enclosure, 1a conduitiof substantially smaller external diameter than the internal diameter of said sleeve having an outlet end dis- "posedwithin the inner end of the sleeve and substantially concentric thereto, the outlet end of said conduit terminating within the sleeve and in spacedrelationship -to the ends of the sleeve, said conduit extending from the inner end of the sleeve and having an opposite inlet end opening into a second room of the enclosure, a driven fan disposed within said conduit adjacent its outlet end and adapted :to impel air therethrough from the inletend thereof and to expel the air therefrom ;into. said sleeve and toward the first mentioned, outlet end thereof, said outlet end of the 'conduitand'sleeve combining'to form a nozzlefor drawing airinto the sleeve from the first room through the inner end thereof and for causing the air to be impelledthrough :the length of the sleeve and ejected therefrom to the atmosphere and means located in said conduit to cause the :air ejected therefrom to pass through the sleeve in a whirling motion for increasing the suction :in the inlet endof the sleeve, said means com- :prising a helical vane disposed in the conduit between the fan and outlet end thereof, the out- .let end .portion of the conduitand the inlet end :portion of the sleev being coaxially disposed to jforma straight annular passage having an annu- Y lar inlet end.

.3. .In a ventilating apparatus, a sleeve adapted to be mounted at one end thereof in arr-opening of an outside wall of an-enclosure and opening 'at said end tothe atmosphere, said sleeve having .aniopposite inner end opening into'a first room of an enclosure, a conduit of substantially smaller externaldiameterthan the internal diameter of said sleeve having an outlet end disposed within the inner end of the sleeve and substantially con- I :centric thereto, the outlet end of said conduit terminating within the sleeve and in spaced relaitionshipto theends of the sleeve, said conduit ,extending from the inner end of the sleeve and having an opposite inlet end opening into a second room of the enclosure, a driven fan disposed within said conduit adjacent its outlet end and adapted toimpel air therethrough from the inlet end thereof and to expel the air therefrom into said sleeve and toward th first mentioned, outlet end thereof, said outlet end of the conduit andsleeve combining to form a nozzle for drawing air into the sleeve'from the last mentioned, .inner inlet end thereof and for causing the air to be impelled through the length of the sleeve and ejected therefrom to the atmosphere, and

means located in said conduit to cause the air :helical'. vane disposed in the concluit and extend ing from adjacent the fan to the outlet end thereof, said vane being of a Width substantially equal to the internal diameter of the conduit, said conduit being formed of detachably connected sections including an outlet section containing the fan and vane; said vane being disposed between the outlet end of said outlet section and the fan, and a bracket sup-porting the fan secured in the outlet section and projecting into the adjacent end of the other section of the conduit.

OSCAR J. DAVENPORT.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date Foster Apr. 4, 1905 Self May 28, 1918 Klein May 6, 1919 Anderson Aug. 15, 1933 Burt July 20, 1937 Davis, Jr., et al Sept. 8, 1942 Hill Dec. 29, 1942 McMahan May 23, 1944 

